Safety analysis and evaluation methodology for fusion systems

A synthesized methodology of safety analysis and evaluation for general fusion systems is proposed. In the course of the methodology development, its main frame has been constructed in order to take account of all safety-related items and to ensure a logical consistency. The safety-related items are divided broadly into two groups. One of them is the public protection from radiological hazard, which is introduced as a safety requirement from an external viewpoint for the fusion system. The other items are the matter from an internal viewpoint and are related to the fusion system behavior in itself. These items are composed of the understanding of a fusion system, the safety ensuring principle and the function based safety analysis. All of these items have been mapped on the frame, considering the mutual relations, among them, consistently. To complete the methodology development, the safety evaluation for the actual design of a fusion system has been performed in conformity to this methodology. Thus, it has been demonstrated that the methodology proposed here is appropriate to the safety analysis and evaluation for the fusion system. (author). 9 refs, 4 figs, 2 tabs